Protective casing

A protector configured to be mounted on a front face of a mobile information terminal, comprising:

• a thin part configured to cover a screen of the mobile information terminal;
• and
• a pair of thick parts disposed on upper and lower sides of the thin part and having a greater thickness than the thin part, wherein
• the thin part comprises:
• a screen cover configured to cover the screen;
• and
• a thin engaging part extending from the screen cover toward a side face of the mobile information terminal and configured to engage with the side face of the mobile information terminal, and
• the thick parts each comprise:
• a base parallel to the screen cover;
• and
• a thick engaging part disposed so as to extend from the bases toward the side face of the mobile information terminal,
• the screen cover and each of the bases of the thick parts are provided on the front face of the mobile information terminal,
• the thin engaging part and the thick engaging part are provided on side face of the mobile information terminal,
• the thick engaging part is connected to the thin engaging part and configured to engage with the side face of the mobile information terminal,
• a cross section of the thin engaging part parallel to a direction and perpendicular to the screen cover is arcuate, the direction is a direction from one side face of the mobile information terminal to the other side face of the mobile information terminal, and
• a cross section of the thick engaging part parallel to the direction and perpendicular to the screen cover is arcuate.